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CHICAGO — More than 50 people face drug-related charges in a case prosecutors say involves Chicago dealers, a Wisconsin courier and Mexico-based trafficker.

The U.S. attorney's office in Chicago said Wednesday that seven people are charged federally and 48 under Illinois law. Many were arrested Tuesday.

Federal court filings say 60-year-old Krzysztof Rak ran a drug trafficking organization in Mexico and worked with a Wisconsin-based courier to distribute fentanyl to Chicago's West Side.

In the same investigation, dubbed "Operation Full Circle," 30-year-old Tekoa Tinch is accused of agreeing to kidnap someone $500,000 in debt to Mexican traffickers. Prosecutors say the Bloomington, Illinois, man was arrested before he could carry out the plan.